Building tile containing cellular glass



Dec. 30, 1941. 1.; H, Hgux 2,268,251

BUILDING TILE CONTAINING CELLULAR GLASS Filed May 20', 1938 I INVENTOR. 54. MER Hflu/ BY r [0 A TORNEYS.

Patented Dec. 30, 194l BUILDING TILE CONTAINING CELLULAR GLASS Elmer H. Haux, Tarentum, Pa., assignor to Pittsburgh Plate Glass Company, Allegheny County,

Pa., a corporation Application May 20, 1938, Serial No. 209,090

1 Claim.

The present invention relates to building units and more particularly to a unit comprising a clay shell filled with cellular vitreous material or glass.

The primary object of my invention is to improve the insulating value and strength of hollow clay tile lby filling such tile with cellular glass.

Another object of my invention is to provide for the manufacture of hollow clay tiles with cellular glass cores expanded therein to form composite integral blocks.

Other objects and advantages of my invention will become more readily apparent from consideration of the following detailed description in conjunction with the accompanying drawing, wherein: a

Figure 1 is a longitudinal sectional view of a tile partially filled with cellular glass-forming material;

Figure 2 is an end view of a tile partially filled with cellular glass-forming material;

Figure 3 is a longitudinal sectional view of a tile which is completely filled with cellular glass;

Figure 4 is an end view of a tile which is completely filled with cellular glass;

Figure 5 is an isometric view of a multiplecored tile which may be produced in accordance with the present invention; and

Figure 6 is a similar View of a modified form of tile which may be produced according to my invention.

In practicing my invention, clay tile l0 may be produced in any convenient manner as, for

example, by extruding or pressing suitably prepared material. The tile may then be fired to vitrify the clay at a temperature of approximately 1600 F. to 2100 F. or, if desired, the tile may be vitrified in the same firing operation in which cellular glass-forming material is expanded to fill the tile, as will be hereinafter described. The clay tile may suitably have the following approximate, composition:

The tile l0 may be of any desired form dethe forming operation. Cellular glass-forming material is then placed in the tile, such material being preferably compressed or in briquette form. A briquette of cellular glass-forming material I I may be formed by mixing together powdered glass and about .25 per cent to 2.5 per cent, by weight, of a suitable gasifying agent, such as calcium 'carbonate, using about 6 per cent, by weight, of a solution of sodium silicate as a binding agent therefor and molding tov form the desired shape of briquette.

The briquette may also be formed by placing the above-mentioned ingredients, without a binder, in a suitable mold and heating it for a short period of time to a temperature of about 1200 F.

The briquette l l is then placed in each hollow tile ID, as shown in Figures 1 and 2, so that the tile is initially filled about to full of cellular it will be impossible for the expanding cellular .glass to escape. However, ifthe tile are stacked in a burning kiln without having the ends covered by plates, when heated sumciently the briquette will expand, and the cellular glass will 7 'bulge out beyond the ends of the tile. These usual manner.

ends'may be removed by any suitable means, such as by knives or saws.

Referring to Figure 5 there is provided a multiple-cell tile ID of rectangular form having a horizontally-extending partition 35 therethrough which divides the tile at its mid-section and a plurality of vertically-extending partitions 36 which intersect. the horizontal partition 35 and divide the interior of the tile into a plurality of cells 31. The tile l0 may be prepared inthe The tile may then be treated by either of the processes described above, to vitrify the clay tile and to fill the cells 31 with cellular glass. It will be noted that the tile shown provides a direct path for heat flow through th webs or partitions 35 and 36.

Referring to Figure 6 which illustrates a multiple-cell tile l0, which is divided into five cells p ndin up n the typ f tmdi die us d in by a horizontally-extending centrally located gered with respect to each other to form the cells 40. The tile l0 may be prepared in the usual manner and treated by either of the processes described above, to vitriiy the clay and to fill the cores 40 with cellular glass, It will be noted that this form of tile eliminates a direct path of heat flow through the webs or partitions 38 and 39 due to the staggered relation of the vertically-extending partitions 39. This construction is obviously advantageous for providing a superior heat-insulating tile for building purposes.

My improved building tile provides a unit "which has high heat-insulating value and possesses inherent ability to impart unusual strength to a wall in which it may be embodied. Also, it

partition 38 and by a plurality of vertically-- extending partitions 39 that are oflset or stag-p provides for the formation of a superior mor tar joint in building walls formed of such tile because the mortar will penetrate the o 11 cells of the cellular glass cores to form an xcellent interlocking means. i

The foregoing detailed description has been given for cleamess or understanding only and no limitations should be imposed upon the appended claim which should be construed as broadly as permissible in view of the prior art.

What I claim is: A building block comprising a burnt clay shell and an expanded cellular glass body filling the inside of the shell and joined to the walls thereof and forming with the latter an integral composite unit. 7

. ELIIER H. HAUX. 

